Try running on the command line one of the 'halevt-mount' commands from the above /var/log/messages to get the actual error message, if it cannot be found from the mentioned file.
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Jari LaamanenAug 21 '12 at 22:43

Updated the post. Tried some ideas. Now USB flash mounts, BUT read-only. How can i fix read-only? Any ideas?
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Max PeaceprayerAug 21 '12 at 23:12

1

No idea what the problem is, but be aware that halevt depends on HAL, which has been deprecated. Modern systems use udev and udisks to mount USB disks.
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Ernest AJan 10 '14 at 11:35